Elitmus Exam Numerical Ability Time Distance and Speed

if a distance of 50m is covered in 1 min,that 90 m in 2 min,and 130 m in 3 min.find the distance covered in 15 mins.

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Elitmus Other Question

Is (p+r)(q+r) odd?
1. p is odd, q is odd.
2. q is odd, r is odd.
Which is correct?
a-1 only
b-2 only
c-Both 1 & 2
d-Neither 1 nor 2
a train leaves station a at 5 a.m and reaches station b at 9am on the same day.another train leaves station b at 7 a.m and reaches station a at 10:30am on the same day.the time at which the two trains cross each other is?